Bambek shoal, about 4 NM offshore, lies SW of the mouth of Sungai Sepang Besar.
It has a depth of 0,3 m near its center and is composed of hard sand.
Its NW and SE sides are steep-to with depths increasing to over 15 m.
A bank with a least charted depth of 4.8m lies between Bambek Shoal and the coast. A deep channel lies between this bank and the coast.
Several detached banks, with depths of 11 to 18.3m, lie W and NW of Bambek Shoal. The W patch, with a depth of 18.7m, lies about 6 miles WNW of the shallowest part of Bambek Shoal.
The NW extremity of a sand ridge, which extends about 10 miles SE toward Tanjong Tuan, lies about 3 miles E of the shallowest part of Bambek Shoal.
Two patches, each with depths of 1.2m, stand on the ridge about 2 miles S and 3.5 miles SE respectively, of Tanjong Kamuning.
Between the N part of this ridge and the coast there is a channel about 0.5 mile wide with depths of 20.1 to 36.6m, suitable for large vessels, leading NW to the anchorage off Port Dickson.